Abstract: A system for monitoring a patient, including: a body-worn monitor having an electrical sensor that measures an electrical waveform from the patient and a wireless transmitter configured to receive the electrical waveform and transmit it over a wireless interface; a computer-based system configured to receive the electrical waveform from the wireless interface and store it in a database; a first algorithm configured to analyze the electrical waveform from the database by comparing it to an secondary electrical waveform previously measured from the patient to determine a property related to the patient's cardiac condition; and a second algorithm configured to analyze the patient's cardiac condition determined by comparing the secondary electrical waveform to the electrical waveform and, in response, transmit a text message.